Question

please can some one modify my program its not working

the task :
a table of the engineering properties of two materials first one is
lumber and second one is wood. The dimensions for both material are
given as the base and the height in inches.
The owner makes lumber with base sizes of 2, 6 and 10 inches. The
height sizes are 2, 6, 10 and 14 inches. Produce table with
appropriate heading to show these values and computed engineering
properties.
we will calculate the cross sectional area whic is : base * high *
e
but Program should not use build in function pow or exp to
calculate power and exponential. Programmer should write his own
function my_power, my_expon to calculate them.